So, what seems to be the problem here?
Well, it's broken down, hasn't it?
OK, but what happened?
Well, first it was making this knocking noise. Then all this steam started coming out from under the bonnet.
I thought it was on fire! And then it just stopped.
Uh, it probably just overheated. Have you checked the water level in the radiator recently?
The what?
Never mind. As for the knocking noise, I'll have to take a look at the engine. Can you open up the bonnet?
Uh, no. I've never done that before.
It's OK, I'll do it.